| /******************************************************************************* |
| * Copyright (c) 2014 Inria |
| * |
| * All rights reserved. This program and the accompanying materials are |
| * made available under the terms of the Eclipse Public License 2.0 which |
| * accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Generoso Pagano, Inria - Initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.tracecompass.tmf.ui.widgets.timegraph.dialogs; |
| |
| import java.util.Arrays; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.jface.viewers.CheckboxTreeViewer; |
| import org.eclipse.jface.viewers.ICheckStateListener; |
| import org.eclipse.jface.viewers.ICheckable; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.ITreeContentProvider; |
| import org.eclipse.jface.viewers.TreeViewer; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.ui.dialogs.FilteredTree; |
| import org.eclipse.ui.dialogs.PatternFilter; |
| import org.eclipse.ui.progress.WorkbenchJob; |
| |
| /** |
| * A <code>FilteredTree</code> wrapping a <code>CheckboxTreeViewer</code>. |
| * |
| * This tree keeps the check state of the nodes in sync, regardless of the fact |
| * that a node is filtered or not. This way, even if an node is filtered (not |
| * visible), the caller can get and set the check state. |
| * |
| * Note that all the "uncheck" operations act only on what is not filtered and |
| * what is child of something not filtered (even if such a child is filtered). |
| * On the contrary, all the "check" operations act only on what is not filtered. |
| * |
| * @author "Generoso Pagano <generoso.pagano@inria.fr>" |
| * @author "Mikael Ferland <mikael.ferland@ericsson.com>" |
| */ |
| public class FilteredCheckboxTree extends FilteredTree implements ICheckable { |
| |
| /** |
| * Set containing only the tree items that are checked |
| * @since 3.1 |
| */ |
| protected Set<Object> fCheckedObjects = new HashSet<>(); |
| |
| /** |
| * Handle to the tree viewer |
| */ |
| private CheckboxTreeViewer fCheckboxTreeViewer; |
| |
| |
| /** |
| * Create a new instance of the receiver. |
| * |
| * @param parent |
| * the parent <code>Composite</code> |
| * @param treeStyle |
| * the style bits for the <code>Tree</code> |
| * @param filter |
| * the filter to be used |
| * @param useNewLook |
| * <code>true</code> if the new <code>FilteredTree</code> look |
| * should be used |
| */ |
| public FilteredCheckboxTree(Composite parent, int treeStyle, PatternFilter filter, |
| boolean useNewLook) { |
| super(parent, treeStyle, filter, useNewLook); |
| } |
| |
| @Override |
| protected TreeViewer doCreateTreeViewer(Composite parentComposite, int style) { |
| fCheckboxTreeViewer = new CheckboxTreeViewer(parentComposite, style); |
| fCheckboxTreeViewer.setUseHashlookup(true); |
| fCheckboxTreeViewer.addCheckStateListener(event -> { |
| if (event.getChecked()) { |
| fCheckedObjects.add(event.getElement()); |
| } else { |
| fCheckedObjects.remove(event.getElement()); |
| } |
| }); |
| return fCheckboxTreeViewer; |
| } |
| |
| @Override |
| protected WorkbenchJob doCreateRefreshJob() { |
| WorkbenchJob job = super.doCreateRefreshJob(); |
| return new WorkbenchJob("Refresh Filter") {//$NON-NLS-1$ |
| @Override |
| public IStatus runInUIThread(IProgressMonitor monitor) { |
| if (fCheckboxTreeViewer.getTree().isDisposed()) { |
| return Status.CANCEL_STATUS; |
| } |
| // Save expanded elements before and after the filtering |
| Set<Object> expandedElements = new HashSet<>(Arrays.asList(fCheckboxTreeViewer.getExpandedElements())); |
| job.runInUIThread(monitor); |
| expandedElements.addAll(Arrays.asList(fCheckboxTreeViewer.getExpandedElements())); |
| fCheckboxTreeViewer.getTree().setRedraw(false); |
| // Expand all to be able to store all checked elements |
| fCheckboxTreeViewer.expandAll(); |
| fCheckboxTreeViewer.setCheckedElements(getCheckedElements()); |
| // Collapse all can change selection |
| ISelection selection = fCheckboxTreeViewer.getSelection(); |
| fCheckboxTreeViewer.collapseAll(); |
| fCheckboxTreeViewer.getTree().setRedraw(true); |
| // Expand tree according to the saved expanded elements |
| fCheckboxTreeViewer.setExpandedElements(expandedElements.toArray()); |
| // Restore the selection |
| fCheckboxTreeViewer.setSelection(selection); |
| return Status.OK_STATUS; |
| } |
| }; |
| } |
| |
| @Override |
| public boolean getChecked(Object element) { |
| return fCheckedObjects.contains(element); |
| } |
| |
| @Override |
| public boolean setChecked(Object element, boolean state) { |
| boolean checkable = fCheckboxTreeViewer.setChecked(element, state); |
| if (!state) { |
| fCheckedObjects.remove(element); |
| } else if (checkable) { |
| fCheckedObjects.add(element); |
| } |
| return checkable; |
| } |
| |
| @Override |
| public void addCheckStateListener(ICheckStateListener listener) { |
| fCheckboxTreeViewer.addCheckStateListener(listener); |
| } |
| |
| @Override |
| public void removeCheckStateListener(ICheckStateListener listener) { |
| fCheckboxTreeViewer.addCheckStateListener(listener); |
| } |
| |
| /** |
| * @return the handle to the tree viewer |
| * @since 3.1 |
| */ |
| public CheckboxTreeViewer getCheckboxTreeViewer() { |
| return fCheckboxTreeViewer; |
| } |
| |
| /** |
| * Returns all the checked elements of this tree, either visible or not. |
| * |
| * @return an array containing all the checked elements |
| */ |
| public Object[] getCheckedElements() { |
| return fCheckedObjects.toArray(); |
| } |
| |
| /** |
| * Checks all the passed elements and unchecks all the other. |
| * |
| * @param elements |
| * the elements to check |
| */ |
| public void setCheckedElements(Object[] elements) { |
| fCheckedObjects = new HashSet<>(); |
| for (Object element : elements) { |
| fCheckedObjects.add(element); |
| } |
| fCheckboxTreeViewer.setCheckedElements(elements); |
| } |
| |
| /** |
| * Sets the check state for the given element and its children in this |
| * viewer. The unchecked state is always set, while the checked state is set |
| * only on visible elements. |
| * |
| * @param element |
| * the element |
| * @param state |
| * the check state to set |
| * @return <code>true</code> if the check state could be set, and |
| * <code>false</code> otherwise |
| */ |
| public boolean setSubtreeChecked(Object element, boolean state) { |
| checkSubtree(element, state); |
| return fCheckboxTreeViewer.setSubtreeChecked(element, state); |
| } |
| |
| /** |
| * Recursively sets the check state on an element and its children, using |
| * the politic specified in {@link #setSubtreeChecked(Object, boolean)} |
| * documentation. |
| * |
| * @param element |
| * the element |
| * @param state |
| * the check state to set |
| * @since 3.1 |
| */ |
| protected void checkSubtree(Object element, boolean state) { |
| if (!state || (fCheckboxTreeViewer.testFindItem(element) != null)) { |
| if (state) { |
| fCheckedObjects.add(element); |
| } else { |
| fCheckedObjects.remove(element); |
| } |
| for (Object o : ((ITreeContentProvider) fCheckboxTreeViewer.getContentProvider()).getChildren(element)) { |
| checkSubtree(o, state); |
| } |
| } |
| } |
| |
| } |